Thermal shock resistance testing device for heat-shrinkable tape or sleeve

Abstract

The utility model relates to a thermal shock resistance testing device for a thermal contraction belt or sleeve, which comprises a support, a shaft rod, a pressing sheet and a sample strip, two ends of the shaft rod are rotatably arranged at the top of the support through bearing seats, the sample strip is tightly pressed by the pressing sheet and is tightly attached to the outer circle of the shaft rod, the pressing sheet is fixed with the shaft rod through a screw, and a handle is eccentrically arranged at one end of the shaft rod. According to the utility model, the test process is simplified, the sample strip is hung on the rotatable shaft rod, and the sample strip is bent while whether the sample strip flows or drops is observed, so that the crack test of the sample strip is facilitated, the test efficiency is greatly improved, and the device is suitable for batch test.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory heat shock testing, and particularly relates to a heat shock testing device for heat shrinkable tapes or sleeves. Background Art

[0002] The existing heat resistance and impact resistance test for heat shrinkable tapes or sleeves is to suspend the specimen strip in an electrothermal blast drying oven at a constant temperature of 225 °C, take it out after four hours and cool it to room temperature, and observe whether there is any flow, crack or drip of the specimen strip. Among them, to observe the crack of the specimen strip, it is necessary to bend the specimen strip 360° with a 25 mm shaft rod. This traditional test method consumes too much time and is complicated to operate, which is not conducive to batch testing. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the above deficiencies, and provides a heat shock testing device for heat shrinkable tapes or sleeves, which simplifies the test process, suspends the specimen strip on a rotatable shaft rod, and while observing whether the specimen strip flows or drips, bends the specimen strip at the same time, which is convenient for the crack test of the specimen strip, greatly improves the test efficiency, and is suitable for batch testing.

[0004] The purpose of the utility model is achieved as follows:

[0005] A heat shock testing device for heat shrinkable tapes or sleeves includes a bracket, a shaft rod, a pressing piece and a specimen strip. Both ends of the shaft rod are rotatably arranged on the top of the bracket through bearing seats. The pressing piece presses and clings the specimen strip to the outer circle of the shaft rod. The pressing piece is fixed to the shaft rod by screws. One end of the shaft rod is eccentrically provided with a handle.

[0006] Preferably, two bearing seats are symmetrically arranged on the top of the bracket, and bearings are arranged between the bearing seats and the shaft rod.

[0007] Preferably, a plurality of specimen strips are arranged at intervals along the axial direction of the shaft rod.

[0008] Preferably, a tray is arranged at the bottom of the bracket.

[0009] The beneficial effects of the utility model are:

[0010] The test process is simplified. The specimen strip is suspended on a rotatable shaft rod. While observing whether the specimen strip flows or drips, the specimen strip is bent at the same time, which is convenient for the crack test of the specimen strip;

[0011] The specimen strips are arranged at intervals along the axial direction of the shaft rod, avoiding the specimen strip contacting the electrothermal blast drying oven or the specimens contacting each other;

[0012] A tray is arranged at the bottom of the bracket to prevent the flow or leakage of the specimen strip during the heat treatment process from polluting the electrothermal blast drying oven. Description of the Drawings

[0013] Figure 1 This is a schematic structural diagram of a heat shock test device for a heat shrinkable tape or sleeve of the present utility model.

[0014] Figure 2 It is Figure 1 an assembly schematic diagram of

[0015] Among them: support 1; shaft rod 2; pressing piece 3; specimen strip 4; bearing seat 5; screw 6; handle 7; tray 8. Specific embodiments

[0016] Referring to Figure 1 and Figure 2 The present utility model relates to a heat shock test device for a heat shrinkable tape or sleeve, including a support 1, a shaft rod 2, a pressing piece 3 and a specimen strip 4. Both ends of the shaft rod 2 are rotatably arranged on the top of the support 1 through bearing seats 5. The two bearing seats 5 are symmetrically arranged on the top of the support 1. A bearing is provided between the bearing seat 5 and the shaft rod 2. The pressing piece 3 presses and clings the specimen strip 4 tightly to the outer circle of the shaft rod 2. The pressing piece 3 is fixed to the shaft rod 2 through a screw 6. One end of the shaft rod 2 is eccentrically provided with a handle 7. By shaking the handle 7, the specimen strip 4 rotates with the shaft rod.

[0017] A plurality of specimen strips 4 are arranged at intervals along the axial direction of the shaft rod 2. Testing a plurality of specimen strips 4 simultaneously greatly improves the testing efficiency.

[0018] A tray 8 is provided at the bottom of the support 1. The tray 8 is embedded in a groove at the bottom of the support 1. The tray 8 can prevent the flowing or dripping during the heat treatment of the specimen strip from polluting the electrothermal blast drying oven.

[0019] Working principle:

[0020] Cut specimen strips 4 with a size of 300 mm × 25 mm from a heat shrinkable tape or sleeve with a thickness of 2 - 4 mm. 300 mm is the shrinkage direction. A plurality of specimen strips 4 are distributed at intervals along the axial direction of the shaft rod 2. Tighten the screw 6. The pressing piece 3 presses each specimen strip 4 tightly on the outer periphery of the shaft rod 2 to ensure that the specimen strip does not fall off. Put the shaft rod fixing the specimen strip together with the support into an electrothermal blast drying oven set at a certain temperature. After heating is completed, the specimen strip is pushed out of the electrothermal blast drying oven together with the support. Observe the state of the specimen strip. At the same time, rotate the handle to make the specimen strip bend 360° around the shaft rod and observe whether there are cracks in the specimen.

[0021] In addition to the above embodiments, the present utility model also includes other embodiments. All technical solutions formed by equivalent transformation or equivalent substitution shall fall within the protection scope of the claims of the present utility model.

Claims

1. A heat-shrinkable tape or sleeve heat shock resistance test device, characterized in that: It includes a bracket, an axial rod, a pressing piece and a sample strip. The two ends of the axial rod are rotatably arranged on the top of the bracket through a bearing seat. The pressing piece presses the sample strip and makes it close to the outer circle of the axial rod. The pressing piece is fixed to the axial rod by screws. A handle is eccentrically arranged at one end of the axial rod.

2. A heat-shrinkable tape or sleeve heat shock resistance testing device according to claim 1, characterized in that: Two bearing seats are symmetrically arranged on the top of the bracket, and bearings are arranged between the bearing seats and the shaft rod.

3. The heat shock resistance testing device for a heat shrinkable tape or sleeve according to claim 1, characterized in that: A plurality of sample strips are arranged at intervals along the axial direction of the shaft rod.

4. The heat shock resistance testing device for a heat shrinkable tape or sleeve according to claim 1, characterized in that: A tray is provided at the bottom of the bracket.

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